{"id":166886,"date":"2022-03-02T06:49:05","date_gmt":"2022-03-02T06:49:05","guid":{"rendered":"\/forum\/forums\/topic\/how-to-resolve-unwanted-velocity-flow-created-at-the-edge-of-the-melting-temperature-line\/"},"modified":"2022-03-03T16:59:45","modified_gmt":"2022-03-03T16:59:45","slug":"how-to-resolve-unwanted-velocity-flow-created-at-the-edge-of-the-melting-temperature-line","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-resolve-unwanted-velocity-flow-created-at-the-edge-of-the-melting-temperature-line\/","title":{"rendered":"How to resolve unwanted velocity flow created at the edge of the melting temperature line"},"content":{"rendered":"
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I am simulating the temperature and velocity distribution of a laser powder bed fusion process with a moving laser heat source. I have attached the temperature distribution and velocity vector figures (full view and zoomed view). Only half domain is simulated due to symmetric nature of the moving laser. The top surface is a powder region and laser heat source moves over it. At the top surface, it has only convection and radiation heat loss boundary condition. The top surface also have Marangoni stress boundary condition the surface tension gradient is negative. This means that the velocity flow direction will be opposite to the direction of the temperature gradient<\/strong>. The picture of temperature gradient vector directions is also attached which shows they are directed inward towards the high temperature region. <\/p>\n

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